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(NoModeL) S. H. BARTLET TQ& H. E. WAITE. SWITCH P0P. TELEPHONBS.

Patented Aug. 8, 1882.

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UNITED TATES PATENT @Frrcie.

SAMUEL H. BARTLETT AND HENRY E. \VAITE, OF NEW YORK, Y., ASSIGN- ORS TOCHARLES F. LIVERMORE, OF SAME PLACE.

SWITCH FOR TELEPHONES.

SPECIFICATION formingpart of Letters Patent No. 262,532, dated August 8,1882.

Application filed April 4, 1882.

To all whom it may concern Be it known that we, SAMUEL H. BARTLETT andHENRY E. \VAITE, of New York, county of New York, State of New York,have invented new and useful Improvements in Switches for Telephones, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying; drawings, making part of thisspecification, in which- Figure 1 represents a rear elevation, partly insection, showing our improved switch. Fig. 2 is a vertical sectionthrough the same; and Figs. 3 and 4 are sectional views similar to Fig.2, showing modifications in the construction and arrangement of some ofthe parts hereinafter described.

Our invention relates to a novel construction of switch for telephones,whereby the receiver is automatically thrown into action or into theline-circuit when the ear-piece is raised for use, and is in a similarmanner thrown out of action or out of the line-circuit when saidear-piece is released, and the transmitter is provided with a I closedbattery-circuit thrown into action simultaneously with the throwing inof the receiver,

and vice versa; and it consists in the combination of the ear-piece witha swiveling elbowlever or crank-arm acting when the ear-piece is raisedto throw the receiver into the line or circuit, and vice versa, andsimultaneously to connect the transmitter and its battery with ordisconnect them from said circuit, as here: inafter explained.

In the accompanying drawings, A represents 3 5 the front of a box, case,or frame designed to be attached to a wall or other convenient point ofsupport, and provided with a central perforation, through which thehorizontal arm or shaft 1) of an elbow or bell-crank lever, B, passes,

said arm being free to turn or revolve in said perforation in suchmanner as to allow the arm I) to hang pendent in'front of the case A, asrepresented. This elbow or crank is by preferonce made hollow, as shownin Figs. 1, 2, and

5 3, and is held in place in the bearing-perforation in case A by meansof a collar, b formed upon or secured to it and a soeketed annularmetallic disk, D, secured to the case A, as shown, or in any convenientmanner, adap tin g it to be held in place and to rotate freely in (Nomodel.)

said plate or case. The inner end of the arm b is provided with spursl,2, and 3, which act upon springs d 61 (Z d as the arm I) is rotated, aswill be explained. These springs are rigidly connected with suitablelugs or brackets, f, at- 5 5 tached to the inner face of the wall A, ofthe case or frame, or to other convenient point of support upondifferent sides of the arm or shaft b, in such manner as to cause theirfree ends to overhang the spurs on inner end ofsaid 6o shaft 7) fromdifferent directions, as shown, removed from contact with said arm orshaft but in sufficiently close proximity thereto to permit the spurs 1,2, and 3 to come in contact with them as the shaft 1) is rocked. 65

The receiver B may be connected with this tube or elbow at either endwith the outer swinging end, as shown in Figs. 1, 2, and 4, or with theinner end, as shown in Fig. 3, the wires extending in the former case tothe receiver, while in the latter a flexible tube, 0, extends from thereceiver through the bent tube to an ear-piece, E, as shown. Where asolid crank-arm is employed, as shown in Fig. 4, the wires or flexibletube may pass through the front A of the case near the swivelingshaft 1) of the latter, and thence to the receiver or earpiece throughan eye in a block, 9, secured to the swinging end of arm B in suchmanner as to adapt the ear-piece or receiver to be heldin 8o convenientposition for use.

B represents a'battery, O a coil,T the transmitter, and G the ground.

The arrangement of the wires is as follows:

It represents theline-wire; h, a wire connecting spring d with anysuitable or convenient signaling-instrument or call-bell (indicated atC, Fig. 1,) and thence with the ground, the arrangement being such thatwhen the swiveling crank-arm is released and hangs pend- 0 cut by itsown gravity, as represented, the spur 1 on the shaft 1) thereof willrest in contact with said spring d, and the line h being connectedtherewith through the annular plate D and arm I), said line-wire will begrounded 5 through the call-bell and wire h. In this position thesprings d d d are out of contact with the spurs on sleeve or shaft b.The spring d is connected by wire i with the secondary of coil (3, andthence through wire 2" with the receiver R, which is grounded throughwire i". The spring (1 is connected by wirej with the primary of coil 0,and thence through j with the transmitter T, and the spring at isconnected by wires and 70 with the battery and transmitter. Now,supposing the arm 13 to be moved or swung up through an arc of onehundred and eighty degrees (more or less, according to the arrangementdescribed) in a direction indicated by the arrow, the spur 1 will bebrought into contact with spring W, the spur 2 into contact with spring(1, and the spur 3 into contact with spring 61 and spring (I will beleft removed from contact with sleeve or shaft I). Bythis movement ofthe swiveling arm and spurs 1, 2, and 3, it will be seen.

that the line h, instead of being grounded through the spring at andwire h, will be grounded through the coil and receiver, bringing thelatter into action. By the spurs 1 and 3 being brought into contact withthe springs d and d the battery 13, transmitter T, and primary of coil 0are brought into action through wiresjy" and 7c 70, thereby providing aclosed battery-circuit for the transmitter to workin. When the arm 13 isreleased it swings by its own gravity back into the pendent positionshown, in which the receiver, as well as the transmitter and the batteryB, is thrown out of action, leaving the line-wire grounded through thespring d, signaling apparatus, and wire it, as explained.

It is not essential that the receiver shall be supported by the rockingcrank-arm B, only that it shall be thrown into or out of the line orcircuit by the movement of said arm, and that the ear-piece shall be soconnected with the arm B as to render it necessary to vibrate the latterinto position for throwing the receiver and transmitter into action whenthe ear-piece is raised for use, the weight of said arm serving toreverse the movement and throw the receiver and transmitter out ofaction when the ear-piece is dropped or released. The hollow or tubularform of the crank-arm is preferred, as giving compactness and neatnessof arrangement and a concentric arrangementofthe wires or flexible tubepassing to the receiver or ear-piece passing through it; but a solid armmay be employed, in which case the arm may be reduced in size so long assufficient weight is retained to insure its automatic action or partialrotation when released.

By the construction and arrangement of the parts described a simple,convenient, and compact form of switch is secured, one whichautomatically throws the receiver and transmitter into the line orcircuit when the ear-piece is raised for use, and which, withoutattention on the part of the operator, automatically throws said partsout ofcircuit or action when the earpiece is released.

Having now described our invention, what we claim as new, is-

1. In a telephoneswiteh, a swinging crankarm, to which the receiver orear-piece is permanently attached, provided with spurs or contact-pointsmoving with said arm, in combination with arms connected with thesignaling apparatus, transmitter, and receiver, whereby the signalingapparatus may be thrown out of and the transmitter and receiver into theline or circuit, and vice versa, with a positive movement by themovement of said crankarm, substantially as described.

2. The tubular crank-arm through which the wires or flexible tube passesto the receiver or ear-piece, said arm being provided with spurs orcontact points moving with it, in combination with arms connected withthe signal apparatus, transmitter, and receiver, whereby said signalapparatus can be thrown out of and the transmitter and receiver into theline or circuit, and vice versa, with a positive movement by themovement of said crank-arm, substantially as described.

3. In a telephone-switch, a pivoted crankarm, to which the receiver orear piece is permanently attached, provided on its pivotal portion withcams or spurs and tangentiallyarranged arms operating in connectiontherewith, in combination with a signal apparatus, transmitter, andreceiver connected with said arms and with the line wires or circuit,substantially as described.

4. In a telephone switch, a tubular rockshat't, to which the receiver orear-piece is permanently attached, provided with spurs or cams, incombination with spring-arms acted upon by said spurs or cams and asignaling apparatus, transmitter, and receiver connected with said armsand with the line-wire, substantially as and for the purpose described.

5. In a telephone-switch, the combination of the rock-shaft, to whichthe receiver or earpiece is permanently attached, and which is providedwith cams or spurs, the spring arms or bars operating in connectiontherewith,and a signaling apparatus, receiver, transmitter, and batteryconnected with said arms, substantially as described, whereby a closedcircuit is formed for the transmitter to work in when thrown intoaction, said parts being arranged and operating substantially asdescribed.

In testimony whereof we have hereunto set ourhands this 30th day ofMarch, A. l). 1882.

SAMUEL H. BARTLETT. HENRY E. WAITE.

Witnesses:

0. H. HANKINSON, GEO. SAMUELs.

